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Seven-step tips for selecting a High-temperature Pressure Transmitter

Seven-step tips for selecting a High-temperature Pressure Transmitter

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2019-08-27
  • Views:12

(Summary description)The key to selecting a high-temperature pressure transmitter is temperature, especially the high-temperature type has no use value if the wrong pressure transmitter is selected.

Seven-step tips for selecting a High-temperature Pressure Transmitter

(Summary description)The key to selecting a high-temperature pressure transmitter is temperature, especially the high-temperature type has no use value if the wrong pressure transmitter is selected.

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2019-08-27
  • Views:12
Information

The key to selecting a High-temperature Pressure Transmitter is temperature, especially the high-temperature type has no use value if the wrong pressure transmitter is selected. The following is a seven-step technique for selecting a high-temperature pressure transmitter.

First, wet material.

What we need to consider is the medium measured by the pressure transmitter. The material of the contact medium part of the general pressure transmitter is 316 stainless steel. If your medium is not corrosive to 316 stainless steel, then basically all the pressure changes The transmitter is suitable for your measurement of the medium pressure. If your medium is corrosive to 316 stainless steel, then we need to use chemical seals. This will not only measure the pressure of the medium, but also effectively prevent the medium from contacting the wetted part of the pressure transmitter. Protect the pressure transmitter and extend the life of the pressure transmitter.

Second, the accuracy of high temperature pressure transmitter

Every type of electronic measuring meter will have accuracy error, but because the accuracy level of each country is different, for example, the accuracy of national standards such as China and the United States is the best linearity part of the sensor, which is usually our The accuracy of the measurement range is between 10% and 90%; the accuracy of the European standard is the worst part of linearity, which is what we usually call the inverse measurement of 0 to 10% and 90% to 100%. Between precision. If the accuracy of the European standard is 1%, the accuracy of the Chinese standard is 0.5%.

Third, the range.

The maximum range of the general sensor measurement is 70% of the sensor's full scale. It is now necessary to measure the pressure of 70 bar. We choose the range of the pressure transmitter should be 100 bar.

Fourth, output signals.

At present, due to various acquisition needs, there are many output signals of pressure transmitters on the market, mainly 4 ~ 20mA, 0 ~ 20mA, 0 ~ 10V, 0 ~ 5V, etc., but the more commonly used are 4 ~ 20mA and There are two types of 0 ~ 10V. Among these output signals I mentioned above, only 4 ~ 20mA is a two-wire system (the output we are talking about is a few-wire system without ground or shielded wires), and the others are three-wire systems.

Fifth, the temperature of the medium.

Because the signal of the high temperature pressure transmitter is partly converted by the electronic circuit, in general, the temperature of the measuring medium of the high temperature pressure transmitter is -30 to +100 degrees. If the temperature is too high, we generally use Condensing the bend to cool the medium, this will allow the manufacturer to reduce the cost of producing a high temperature pressure transmitter for you.

Sixth, measure the medium.

Generally, we measure relatively clean fluids. We can directly use standard pressure transmitters. If the medium you are measuring is easy to crystallize or sticky, we generally use an external diaphragm. Or use with chemical seal, this will effectively prevent the medium from blocking the pressure measuring hole.

Seventh, others.

确定 After confirming the above six parameters, please also confirm the process connection interface of your high-temperature pressure transmitter and the power supply voltage of the pressure transmitter; if you use it in special industrial awards, you must also consider the explosion-proof level.

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